<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }

        .list {
            width: 100%;
            height: 48px;

        }

        .list_left {
            width: 450px;
            height: 48px;

            float: left;
            list-style: none;
        }

        .list_right {
            width: 450px;
            height: 48px;

            float: right;

        }

        .item {
            width: 100px;
            height: 48px;

            float: left;
            margin-left: 30px;
            text-align: center;
            line-height: 48px;
        }
    </style>
</head>

<body>

    <div class="list">
        <!-- left -->
        <ul class="list_left">
            <li class="item">京东</li>
            <li class="item">淘宝</li>
            <li class="item">百度</li>
        </ul>
        <!-- right -->
        <div class="list_right"></div>
    </div>

</body>

</html>